Flexible airfoil aircraft



FIG. 1 is an environmental perspective view of a first embodiment of a flexible airfoil aircraft, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a left side elevational view, the right side being a mirror image thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of a flexible airfoil and background in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a flexible airfoil aircraft, as shown and described. 